Patch "powerpc/mm: Flush radix process translations when setting MMU type" has been added to the 4.15-stable tree

This is a note to let you know that I've just added the patch titled

powerpc/mm: Flush radix process translations when setting MMU type

to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
powerpc-mm-flush-radix-process-translations-when-setting-mmu-type.patch
and it can be found in the queue-4.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Alexey Kardashevskiy <[email protected]>
Date: Thu, 1 Feb 2018 16:09:44 +1100
Subject: powerpc/mm: Flush radix process translations when setting MMU type

From: Alexey Kardashevskiy <[email protected]>

commit 62e984ddfd6b056d399e24113f5e6a7145e579d8 upstream.

Radix guests do normally invalidate process-scoped translations when a new pid is allocated but migrated guests do not invalidate these so migrated guests crash sometime, especially easy to reproduce with migration happening within first 10 seconds after the guest boot start on the same machine.

This adds the "Invalidate process-scoped translations" flush to fix radix guests migration.

---
 arch/powerpc/mm/pgtable_64.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -483,6 +483,8 @@ void mmu_partition_table_set_entry(unsig
 	if (old & PATB_HR) {
 		asm volatile(PPC_TLBIE_5(%0,%1,2,0,1) : :
 			     "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid));
+		asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : :
+			     "r" (TLBIEL_INVAL_SET_LPID), "r" (lpid));
 		trace_tlbie(lpid, 0, TLBIEL_INVAL_SET_LPID, lpid, 2, 0, 1);
 	} else {
 		asm volatile(PPC_TLBIE_5(%0,%1,2,0,0) : :

Patches currently in stable-queue which might be from [email protected] are

queue-4.15/powerpc-mm-flush-radix-process-translations-when-setting-mmu-type.patch